| Reston to Mangualde | 3,595.70 mi (5,786.72 km) |
| Reston to Marco de Canavezes | 3,561.81 mi (5,732.18 km) |
| Reston to Marinha Grande | 3,561.10 mi (5,731.03 km) |
| Reston to Massama | 3,570.91 mi (5,746.82 km) |
| Reston to Matosinhos | 3,535.24 mi (5,689.42 km) |
| Reston to Mealhada | 3,568.03 mi (5,742.19 km) |
| Reston to Melgaco | 3,532.61 mi (5,685.19 km) |
| Reston to Melres | 3,552.73 mi (5,717.56 km) |
| Reston to Mira | 3,552.92 mi (5,717.88 km) |
| Reston to Miranda do Corvo | 3,581.18 mi (5,763.36 km) |
| Reston to Mirandela | 3,600.62 mi (5,794.63 km) |
| Reston to Mogadouro | 3,626.90 mi (5,836.93 km) |
| Reston to Moimenta da Beira | 3,592.99 mi (5,782.35 km) |
| Reston to Moita | 3,588.26 mi (5,774.75 km) |
| Reston to Moncao | 3,523.48 mi (5,670.50 km) |
